Status of topping combustor program for second generation pressurized fluidized bed cycles

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:78188

Domeracki, W F ^[1]; Bachovchin, D M ^[2]

---

1. Westinghouse Electric Corp., Orlando, FL (United States). Power Generation Business Unit
2. Westinghouse Electric Corp., Pittsburgh, PA (United States). Science and Technology Center

Second-Generation Pressurized Fluidized Bed (PFB) combined cycles employ topping combustion to raise the turbine inlet temperature for enhanced cycle efficiency. This concept creates special combustion system requirements that are very different from requirements of conventional gas turbine systems. The topping combustor provides the means for achieving state-of-the-art turbine inlet temperatures and is the main contributor to enhanced plant performance. The objective of this program is to develop a topping combustor that provides low emissions, and is a durable, efficient device exhibiting stable combustion and manageable wall temperature. The combustor will be required to burn a low-Btu syngas under normal ``coal-fired`` conditions. However, for start-up and/or carbonizer outage, it may be necessary to fire a clean fuel, such as, oil or natural gas. Prior testing has shown the Westinghouse Multi-Annular Swirl Burner (MASB) to have excellent potential for this application. Metal wall temperatures can be maintained at reasonable levels, even though most ``cooling`` is done by 1,600 F vitiated air. Good pattern factors and combustion efficiencies have been obtained. Additionally, low conversion rates of fuel bound nitrogen to NO{sub x} have been demonstrated.

• OSTI ID: 78188
• Report Number(s): CONF-941007--; ISBN 0-7918-1384-3
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
AIR POLLUTION ABATEMENT
COMBINED-CYCLE POWER PLANTS
FLUIDIZED BED BOILERS
GAS TURBINES
NITROGEN OXIDES
TOPPING CYCLES